Glandless ‘NuMex COT 17 GLS’) Cotton Release

The New Mexico Agricultural Experiment Station announces the release of a glandless ‘NuMex COT 17 GLS’) cotton (Gossypium hirsutum L.) which carries the incomplete dominant glandless allele Gl2e. NuMex COT 17 GLS was derived from an advanced backcross progeny of a cross between the Gl2e allele donor ‘Bahtim 110’ (G. barbadense) and glanded Upland cotton ‘CRI 12', followed by five backcrosses with glanded Upland ‘CRI 35’ as the recurrent parent. It is resistant to Fusarium wilt race 4 when evaluated in the field in California and in the greenhouse in New Mexico. This new cultivar was tested in 7 replicated field trials in New Mexico in 2013-2017 and in 11 tests across 9 states in 2014. As compared to glandless ‘Acala GLS’, ‘Acala 1517-18 GLS’, and ‘NuMex COT 15 GLS’, NuMex COT 17 GLS yielded 26, 16, and 13% more lint, respectively, and it produced 93% of glanded ‘Acala 1517-08’ yield. It had significantly higher lint percentage than all the check cultivars. It is classified as a medium staple with fiber quality inferior to Acala cotton cultivars. NuMex COT 17 GLS is especially adapted to the Mississippi Delta as it was the top yielder in the region. It is resistant to four races of bacterial blight and less susceptible to Alternaria leaf spot than Acala 1517-08. The release of NuMex COT 17 GLS cultivar represents the first successful introgression from G. barbadense germplasm with Fusarium wilt race 4 resistance.

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